Field investigation of blast-induced damage of the sedimentary strata rock mass at PT Kaltim Prima Coal, Indonesia

G. M. Simangunsong, E. Yulianto, S. Kramadibrata, K. Matsui, Hideki Shimada, S. Kubota, Y. Ogata

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Abstract

Five blasting operations at two different pits within PT Kaltim Prima Coal (KPC) were carefully investigated. The areas of interest were Harapan South Pit and Melawan Thiess Pit. The field investigation was carried out to measure the significance of the blast induces fractures within a rock mass. First of all, investigation holes were made and drilled relatively perpendicular with blasting row at near distance behind the last blasting row. To quantitatively determine rock mass fractures, a borehole camera was applied to investigate cracks before and after the blast. A vibration geophone was arranged close to the collar of each investigation hole to monitor peak particle velocity (PPV) of the ground surface. Plotting the PPV as a function of distance divided by cube root or square root of the explosive weight was employed to predict attenuation or decay the PPV. From the data obtained, it was found that the cracks increase proportionally with the PPV.

Original languageEnglish
Pages (from-to)175-180
Number of pages6
JournalMaterials Science Forum
Volume465-466
Publication statusPublished - Nov 25 2004
EventProceedings of the 1st International Symposium on Explosion, Shock Wave and Hypervelocity Phenomena (ESHP Symposium) - Kumamoto, Japan
Duration: Mar 15 2004Mar 17 2004

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Simangunsong, G. M., Yulianto, E., Kramadibrata, S., Matsui, K., Shimada, H., Kubota, S., & Ogata, Y. (2004). Field investigation of blast-induced damage of the sedimentary strata rock mass at PT Kaltim Prima Coal, Indonesia. Materials Science Forum, 465-466, 175-180.